Hi thanks for the reply.
This is still my wiring diagram.
My battery holder contains a 3.2V solid state output so I plugged the wemos directly.
According to your scheme, I should connect the red wire to A0 and will it work? Or I misunderstood. Because you have the white wire on your circuit directly from the positive pole of the battery on A0 and the red wire goes from 3V3 to the solar panel from nowhere?